Question

what are the effects of short circuit

Answer 1

results in the excess flow of current in power source and can damage our domestic apparatus

Answer 2

Hy friend, here's ur ans...
Effects of Short-Circuit

When a short-circuit occurs, the current in the system increases to an abnormally high value while the system voltage decreases to a low value.

The heavy current due to short-circuit causes excessive heating which may result in fire or explosion. Sometimes short-circuit takes the form of an arc and causes considerable damage to the system. For example, an arc on a transmission line not cleared quickly will burn the conductor severely causing it to break, resulting in a long time interruption of the line.

The low voltage created by the fault has a very harmful effect on the service rendered by the power system. If the voltage remains low for even a few seconds, the consumer's motors may be shut down and generators on the power system may become unstable.

Due to above deterimental effects of short-circuit, it is desirable and necessary to disconnect the faulty section and restore normal voltage and current conditions as quickly as possible.

Short circuits can produce very high temperatures due to the high power dissipation in the circuit. This high temperature can be utilized in the application.


Arc welding is a common example of the practical application of the heating due to a short circuit. The power supply for an arc welder can supply very high currents that flow through the welding rod and the metal pieces being welded. The point of contact between the rod and the metal surfaces gets heated to the melting point, fusing a part of the rod and both surfaces into a single piece.

Hope it helped you...